package org.example.admin.controller;

import com.google.code.kaptcha.Producer;
import org.example.common.config.RuoYiConfig;
import org.example.common.constant.Constants;
import org.example.common.core.domain.AjaxResult;
import org.example.common.core.redis.RedisCache;
import org.example.common.utils.sign.Base64;
import org.example.common.utils.uuid.IdUtils;
import org.example.system.service.ISysConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

/**
 * Copyright: Copyright (c) 2022 Asiainfo
 *
 * @ClassName: org.example.admin.controller.CaptchaController
 * @Description: 配置登录验证码
 * @version: v1.0.0
 * @author: 炫沙糖桔的鹏仔
 * @date: 2022/8/8 11:34
 * <p>
 * Modification History:
 * Date         Author          Version            Description
 * ------------------------------------------------------------
 * 2022/8/8      炫沙糖桔的鹏仔          v1.0.0               修改原因
 */
@RestController
public class CaptchaController {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;
    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;
    @Autowired
    private RedisCache redisCache;
    @Autowired
    private ISysConfigService ISysConfigService;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public AjaxResult getCode(HttpServletResponse response) throws IOException {
        AjaxResult ajax = AjaxResult.success();
        boolean captchaOnOff = ISysConfigService.selectCaptchaOnOff();
        ajax.put("captchaOnOff", captchaOnOff);
        if (!captchaOnOff) {
            return ajax;
        }
        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;
        String capStr = null, code = null;
        BufferedImage image = null;
        // 生成验证码
        String captchaType = RuoYiConfig.getCaptchaType();
        if ("math".equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        } else if ("char".equals(captchaType)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }
        redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return AjaxResult.error(e.getMessage());
        }
        ajax.put("uuid", uuid);
        ajax.put("img", Base64.encode(os.toByteArray()));
        return ajax;
    }
}
